This 24.5-mile trail leads you through the city. Starting at the World Forestry Center, the trail strings together some of Portland's best nature attractions, Hoyt Arboretum, the Audubon Society and Forest Park. The terrain depends on what portion of the trail you tackle, from the very hilly area of Washington Park to the more gradual swales of the 10 northern-most miles of the trail. Maps are available at the trailhead.